NEMATODES

taxonomy, morphology and phylogeny

Ontogeny of the Complex Sperm in the Macrostomid Flatworm Macrostomum lignano (Macrostomorpha, Rhabditophora)

Publication Type:Journal Article
Year of Publication:2009
Authors:M. Willems, Leroux, F., Claeys, M., Boone, M., Mouton, S., Artois, T., Borgonie, G.
Journal:Journal of MorphologyJournal of Morphology
Volume:270
Pagination:162-174
Date Published:Feb
ISBN Number:0362-2525
Accession Number:WOS:000262901900003
Abstract:

Spermiogenesis in Macrostomum lignano (Macrostomorpha, Rhabditophora) is described using light- and electron microscopy of the successive stages in sperm development. Ovoid spermatids develop to highly complex, elongated sperm possessing an undulating distal (anterior) process (or "feeler"), bristles, and a proximal (posterior) brush. In particular, we present a detailed account of the morphology and ontogeny of the bristles, describing for the first time the formation of a highly specialized bristle complex consisting of several parts. This complex is ultimately reduced when sperm are mature. The implications of the development of this bristle complex on both sperm maturation and the evolution and function of the bristles are discussed. The assumed homology between bristles and flagellae questioned. J. Morphol. 270:162-174, 2009. (C) 2008 Wiley-Liss, Inc.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith